Syntax
You cannot view the ASP source code by selecting "View source" in a browser, you will only see the output from the ASP file, which is plain HTML. This is because the scripts are executed on the server before the result is sent back to the browser.
In our ASP tutorial, every example displays the hidden ASP source code. This will make it easier for you to understand how it works.
The Basic Syntax Rule
An ASP file normally contains HTML tags, just like an HTML file. However, an ASP file can also contain server scripts, surrounded by the delimiters <% and %>. Server scripts are executed on the server, and can contain any expressions, statements, procedures, or operators valid for the scripting language you prefer to use.
The Response Object
The Write method of the ASP Response Object is used to send content to the browser. For example, the following statement sends the text "Hello World" to the browser:
<%
response.write("Hello World!")
%> |
VBScript
You may use different scripting languages in ASP files. However, the default scripting language is VBScript:
<html>
<body>
<%
response.write("Hello World!")
%>
</body>
</html> |
The example above writes "Hello World!" into the body of the document.
JavaScript
To set JavaScript as the default scripting language for a particular page you must insert a language specification at the top of the page:
<%@ language="javascript"%>
<html>
<body>
<%
Response.Write("Hello World!")
%>
</body>
</html> |
Note: Unlike VBScript - JavaScript is case sensitive. You will have to write your ASP code with uppercase letters and lowercase letters when the language requires it.
Other Scripting Languages
ASP is shipped with VBScript and JScript (Microsoft's implementation of JavaScript). If you want to script in another language, like PERL, REXX, or Python, you will have to install script engines for them.
Important: Because the scripts are executed on the server, the browser that displays the ASP file does not need to support scripting at all! |
